LAND SNAILS. 127 
in the vicinity of Bristol; Swansea; and on the 
banks of the river Tyne, about Newcasile: in 
these localities it is said to have been introduced 
with ballast. 
In the Bristol district it was first observed 
between Brishngton and Keynsham, in 1825. 
Gardner, in his “ Natural History of Stafford- 
shire,” says, “it is not rare in the Dovesdale 
and Wetton valleys.” And as it occurs also in 
North Gloucestershire, at Evesham, there is no 
reason to doubt that the Kentish snail is truly 
indigenous to the western counties of England. 
Hetix Cartustana— (Pl. VIIL., fig. 70).—So 
called from its having been first discovered near a 
Carthusian Monastery ; it is closely related to the 
Kentish snail, and possesses a white internal rib 
and an umbilicus, as in that species, but differs 
from it in its much smaller size, being about half 
an inch in diameter, more solid and not so glossy, 
nearly opaque; it is more depressed, and the 
umbilicus is minute. 
It is found on the short herbage clothing the 
chalk downs of the Kentish and Sussex coasts. 
It appears to be confined to the neighbourhood 
of the sea, and to the chalk soil; though there 
are many favourable localities for it along the 
coast intervening between Folkestone and Hast- 
bourne, yet I have failed to find, though often 
sought for it. The sameis true of H. ericetorwm 
